DISEASES OP THE HOC 115 



often causes the animal to walk lame on the foreleg 

 of the affected side, or if both sides are affected the 

 animal will move stiffly. There is a short spasmodic 

 cough causing much distress. The breathing is 

 fast and short and the abdominal muscles are 

 brought into play to help to expel the air, as the 

 pig keeps the walls of its chest as quiet as possible 

 while suffering from this disease. The pulse is 

 fast, small and hard and the temperature will be 

 elevated, indicating fever. If the ribs are pressed 

 upon the animal will evince pain and may squeal. 

 It is not easy to judge the amount of pain a pig may 

 suffer by pressure, as they will sometimes squeal 

 on x)ressure when there is nothing the matter with 

 them; still when other symptoms are present this 

 one will assist. When there is much fever the pig 

 will refuse its food, but may drink water. In bad 

 cases it is very restless; it moves about with its 

 back arched and stiff, and when it lies down it will 

 be on its sternum. If the pig can be kept quiet and 

 the ear applied to the chest in the early stages of 

 the disease a crackling or crepitating sound will be 

 heard at each movement of the lungs. If the acute 

 stage is not relieved it goes on to the second or sub- 

 acute; usually at this stage of the disease there is 

 an outpouring of fluid into the cavity of the chest ; 

 as this increases the pain diminishes, but the 

 breathing becomes more labored and difficult 

 (dyspnea) and as the cavity fills up diminishing the 

 breathing space the animal soon dies from suffoca- 

 tion. When effusion takes place the pain is re- 

 duced and the animal may appear better for a day 



